CN115338559B - Coating, welding rod and deposited metal - Google Patents
Coating, welding rod and deposited metal Download PDFInfo
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- CN115338559B CN115338559B CN202210993624.2A CN202210993624A CN115338559B CN 115338559 B CN115338559 B CN 115338559B CN 202210993624 A CN202210993624 A CN 202210993624A CN 115338559 B CN115338559 B CN 115338559B
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- 238000003466 welding Methods 0.000 title claims abstract description 97
- 239000011248 coating agent Substances 0.000 title claims abstract description 58
- 238000000576 coating method Methods 0.000 title claims abstract description 58
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 33
- 239000002184 metal Substances 0.000 title claims abstract description 33
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 17
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 16
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 13
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims abstract description 12
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 12
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 35
- 229910052739 hydrogen Inorganic materials 0.000 claims description 35
- 239000001257 hydrogen Substances 0.000 claims description 35
- 239000012535 impurity Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 10
- 238000010891 electric arc Methods 0.000 abstract description 7
- 239000000956 alloy Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 239000000306 component Substances 0.000 description 16
- 238000003860 storage Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000002360 preparation method Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- 238000000227 grinding Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 239000010436 fluorite Substances 0.000 description 4
- 239000004579 marble Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 229910001309 Ferromolybdenum Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 239000010456 wollastonite Substances 0.000 description 3
- 229910052882 wollastonite Inorganic materials 0.000 description 3
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention particularly relates to a coating, a welding rod and deposited metal, which belongs to the technical field of welding materials, wherein the welding rod comprises a steel core and a coating, the coating is coated on the steel core, and the coating comprises the following components in parts by mass: 150-160 parts of calcium carbonate, 50-60 parts of fluoride and titanium dioxide: 25-30 parts of silicon dioxide: 30-32 parts of ferrosilicon powder: 25-28 parts of manganese powder: 20-23 parts of nickel powder: 30-35 parts of the alloy material has good welding process performance, stable electric arc, small splashing, attractive weld joint formation, meets the welding requirement of all positions, has excellent strength and toughness under the condition of a welding state, and has higher impact toughness at-50 ℃ after long-time heat treatment at 580+/-10 ℃ multiplied by 3-6 h.
Description
Technical Field
The invention belongs to the technical field of welding materials, and particularly relates to a coating, a welding rod and deposited metal.
Background
Hydrogen has the characteristics of wide source, no pollution, reproducibility, high heat value and the like, so hydrogen energy is also considered as an ultimate solution of human energy. The development of hydrogen energy is quickened, and the realization of the large-scale application of the hydrogen energy has great significance for solving the energy crisis, the environmental problem and the sustainable development, and the status of the hydrogen energy is gradually improved. At present, complete industrial chains of hydrogen energy research and development, manufacturing, storage, transportation, application and the like are basically formed, but at present, a plurality of technical problems in the aspects of hydrogen production, hydrogen storage, hydrogen supply and the like need to be solved, the cost of hydrogen is also at a higher level, the development of the hydrogen energy industry is affected, and particularly, a safe, efficient and economic hydrogen storage and transportation technology is a key for realizing industrialization and commercialization of hydrogen energy. The hydrogen volume density is extremely low, the high-efficiency storage and transportation difficulty is high, and the improvement of the storage and transportation efficiency is a great bottleneck for the large-scale development of the hydrogen energy industry.
At present, the main hydrogen storage technology comprises three forms of high-pressure gaseous hydrogen storage, low-temperature liquid hydrogen storage and solid hydrogen storage, each hydrogen storage mode has the advantages and disadvantages, the high-pressure gaseous hydrogen storage is taken as the main mode in the current hydrogen storage in China, the gaseous hydrogen storage is realized, the light-weight equipment is realized, the adoption of an ultra-high-strength 800 MPa-grade steel plate with excellent hydrogen resistance becomes the preference, the heat treatment mode is required in the manufacturing process of a hydrogen storage container, and the corresponding requirements are also put forward on matched welding materials. Early 800 MPa-grade high-strength steel welding materials are applied to industries such as water engineering and the like, but cannot solve the problem that the low-temperature impact toughness is rapidly reduced after heat treatment.
Disclosure of Invention
The purpose of the application is to provide a coating, a welding rod and deposited metal, so as to solve the problem that the low-temperature impact toughness of the existing welding material is drastically reduced after heat treatment.
The embodiment of the invention provides a coating, which comprises the following components in parts by mass: 150-160 parts of calcium carbonate, 50-60 parts of fluoride and titanium dioxide: 25-30 parts of silicon dioxide: 30-32 parts of ferrosilicon powder: 25-28 parts of manganese powder: 20-23 parts of nickel powder: 30-35 parts.
Optionally, the ingredients of the coating comprise, in parts by weight: 153-157 parts of calcium carbonate, 53-57 parts of fluoride and titanium dioxide: 27-28 parts of silicon dioxide: 30.5-31.5 parts of ferrosilicon powder: 26-27 parts of manganese powder: 21-22 parts of nickel powder: 31-34 parts.
Optionally, the basicity coefficient B of the coating is more than or equal to 5.
Optionally, the basicity coefficient B of the coating is 5-6.
Based on the same inventive concept, the embodiment of the invention also provides an electrode, which comprises a steel core and a coating, wherein the coating is coated on the steel core, and the coating is the coating.
Optionally, the steel core comprises the following components in percentage by mass: c is more than or equal to 0.02% and less than or equal to 0.05%, mn is more than or equal to 0.30% and less than or equal to 0.50%, si is more than or equal to 0.04%, S is less than or equal to 0.005%, P is less than or equal to 0.005%, as is less than or equal to 0.007%, and the balance is Fe and unavoidable impurities.
Optionally, the coating accounts for 33% -37% of the whole welding rod.
Optionally, the diameter of the welding rod is 3.2-5.0mm.
Based on the same inventive concept, embodiments of the present invention also provide a deposited metal that is produced by the electrode as described above during the welding process.
Optionally, the deposited metal has a diffuse hydrogen content of less than 4mL/100g.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
the welding rod provided by the embodiment of the invention has good welding process performance, stable electric arc, small splashing, attractive weld joint forming, and good strength and toughness under the condition of a welding state, meets the welding requirement of all positions, and further achieves high impact toughness at-50 ℃ after long-time heat treatment at 580+/-10 ℃ multiplied by 3-6 h.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Detailed Description
The advantages and various effects of the present invention will be more clearly apparent from the following detailed description and examples. It will be understood by those skilled in the art that these specific embodiments and examples are intended to illustrate the invention, not to limit the invention.
Throughout the specification, unless specifically indicated otherwise, the terms used herein should be understood as meaning as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification will control.
Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or may be prepared by existing methods.
The technical scheme of the embodiment of the application aims to solve the technical problems, and the overall thought is as follows:
the purpose of the application is to provide a special low alloy steel manual welding rod capable of meeting the requirement of heat treatment state low-temperature toughness ultrahigh strength hydrogen storage tank welding. The welding process has good performance, stable electric arc, small splashing, attractive weld joint formation, meets the welding requirement of all positions, has excellent strength and toughness under the condition of a welding state, and further ensures the purpose of high impact toughness at-50 ℃ after long-time heat treatment at 580+/-10 ℃ for 3-6 hours.
According to an exemplary embodiment of the present invention, there is provided a coating, the coating comprising the following components in parts by mass: 150-160 parts of calcium carbonate, 50-60 parts of fluoride and titanium dioxide: 25-30 parts of silicon dioxide: 30-32 parts of ferrosilicon powder: 25-28 parts of manganese powder: 20-23 parts of nickel powder: 30-35 parts.
The main functions of each component in the coating are as follows:
calcium carbonate: caCO (CaCO) 3 The content is between 95 and 98 percent, and the raw materials are used as slag-making and gas-making materials in the coating of the welding rod, and are decomposed into CaO and CO in the welding process 2 The gas provides double protection of slag and gas, is a main raw material for controlling the high alkalinity of the coating, and has the functions of removing S and P for the welding line.
Fluoride: main component CaF 2 More than or equal to 96 percent, is used as slag-making and gas-making materials in the coating of the welding rod, is one of main raw materials for improving the alkalinity of the coating, can reduce the surface tension during welding, improves the fluidity of a molten pool and slag, has excellent stripping 0 and stripping H effects, and is also a main material for ensuring that deposited metal has lower diffusion hydrogen.
Titanium dioxide: the main chemical component is titanium oxide TiO 2 The welding rod is mainly used as a slag former and an arc stabilizer, so that the viscosity of slag can be improved, and stable arc and forming of a welding line are ensured, thereby the welding rod can meet the all-position welding requirement.
Ferrosilicon: ferrosilicon is added as an alloy element, and is used as a deoxidizer while activating a molten pool.
Silicon micropowder: the silicon micropowder is used as a slag former and the alkalinity is controlled, the welding cannot be realized due to the excessively high alkalinity, and the alkalinity coefficient B is controlled to be about 5-6.
Manganese powder: the deoxidizer and the desulfurizing agent are good, can prevent the weld joint from forming FeS with low melting point, are also nucleation points of crystal grains, can control the shape of inclusions, and have obvious effects of refining the crystal grains, improving the strength and improving the impact performance.
In some embodiments, the ingredients of the coating include, in parts by mass: 153-157 parts of calcium carbonate, 53-57 parts of fluoride and titanium dioxide: 27-28 parts of silicon dioxide: 30.5-31.5 parts of ferrosilicon powder: 26-27 parts of manganese powder: 21-22 parts of nickel powder: 31-34 parts. The coating comprises the following components in parts by mass: 153-157 parts of calcium carbonate, 53-57 parts of fluoride and titanium dioxide: 27-28 parts of silicon dioxide: 30.5-31.5 parts of ferrosilicon powder: 26-27 parts of manganese powder: 21-22 parts of nickel powder: 31-34 parts.
In some embodiments, the basicity coefficient B of the coating is greater than or equal to 5. In this example, the basicity coefficient B of the coating is 5-6.
According to another exemplary embodiment of the present invention, there is provided an electrode including a steel core and a coating, the coating being coated on the steel core, the coating being as described above.
The problems of insufficient cracking resistance and low-temperature toughness of 800 MPa-grade weld metal after heat treatment are solved by the combination of the coating components and the matching of the coating components with a high-quality carbon steel core.
In some embodiments, the composition of the steel core comprises, in mass fraction: c is more than or equal to 0.02% and less than or equal to 0.05%, mn is more than or equal to 0.30% and less than or equal to 0.50%, si is more than or equal to 0.04%, S is less than or equal to 0.005%, P is less than or equal to 0.005%, as is less than or equal to 0.007%, and the balance is Fe and unavoidable impurities.
In some embodiments, the coating mass is 33% -37% of the total electrode mass.
In some embodiments, the diameter of the electrode is 3.2-5.0mm.
According to another exemplary embodiment of the present invention, a deposited metal is provided that is produced from an electrode as described above during a welding process.
The deposited metal is subjected to long-time heat treatment at 580+/-10 ℃ for 3-6 hours: the tensile strength is 810-860Mpa, the yield strength is not less than 780Mpa, the elongation is not less than 16%, the impact at 50 ℃ below zero reaches 110J, and the content of the diffused hydrogen of the deposited metal is less than 4mL/100g. Effectively improves the low-temperature performance of the welding seam after heat treatment, and solves the problems of insufficient cracking resistance and low-temperature toughness of 800 MPa-grade welding seam metal after heat treatment. The welding process has good performance, stable electric arc, small splashing and beautiful weld joint formation.
The coating, electrode and deposited metal of the present application will be described in detail with reference to examples, comparative examples and experimental data.
Example 1
A welding rod adopts a steel core with the diameter of 4.0mm multiplied by 400mm as a rod core of a welding core, and comprises the chemical components of 0.032wt% of C, 0.41wt% of Mn, 0.018wt% of Si, 0.003wt% of S, 0.004wt% of P and the balance of iron; taking the preparation and production of 100Kg manual welding electrode as an example, the coating of the embodiment accounts for 35wt% of the weight of the whole welding wire, and the components in the coating are as follows: 160g of calcium carbonate, 50g of fluoride and titanium dioxide: 28g, silicon dioxide: 30g, ferrosilicon powder: 27g of manganese powder: 22g, nickel powder: 35g, the rest is binder and plasticizer, the alkalinity coefficient B is 5.5, various medicinal powders are sieved by a sieve of-40 meshes, and then uniformly mixed, and potassium sodium 1 is added: 1, water glass with the modulus of 3.1 and the concentration of 41-42 Baume degrees is mixed and stirred for more than or equal to 30min, the welding rod is produced by an oil pressure powder coating machine, and the produced welding rod is subjected to grinding head and tail grinding, and is dried by coating moisture at 380+/-10 ℃ to form a product.
Example 2
A welding rod, the steel core of the welding rod is the same as that of example 1, taking the preparation and production of a manual welding rod of 100Kg as an example, the coating of the example accounts for 33wt% of the whole welding rod, and the components in the coating are as follows: 150g of calcium carbonate, 60g of fluoride and titanium dioxide: 30g, silicon dioxide: 32g, ferrosilicon powder: 25g of manganese powder: 20g, nickel powder: 30g, the rest is binder and plasticizer, the alkalinity coefficient B is 5.0, various medicinal powders are sieved by a sieve of-40 meshes and then are uniformly mixed, and potassium sodium 1 is added: 1, water glass with the modulus of 3.1 and the concentration of 41-42 Baume degrees is mixed and stirred for more than or equal to 30min, the welding rod is produced by an oil pressure powder coating machine, and the produced welding rod is subjected to grinding head and tail grinding, and is dried by coating moisture at 380+/-10 ℃ to form a product.
Example 3
A welding rod, the steel core of the welding rod is the same as that of example 1, taking the preparation and production of a manual welding rod of 100Kg as an example, the coating of the example accounts for 33wt% of the whole welding rod, and the components in the coating are as follows: 160g of calcium carbonate, 50g of fluoride and titanium dioxide: 25g, silica: 30g, ferrosilicon powder: 27g of manganese powder: 23g, nickel powder: 35g, the rest is binder and plasticizer, the alkalinity coefficient B is 5.0, various medicinal powders are sieved by a sieve of-40 meshes and then are uniformly mixed, and potassium sodium 1 is added: 1, water glass with the modulus of 3.1 and the concentration of 41-42 Baume degrees is mixed and stirred for more than or equal to 30min, the welding rod is produced by an oil pressure powder coating machine, and the produced welding rod is subjected to grinding head and tail grinding, and is dried by coating moisture at 380+/-10 ℃ to form a product.
Comparative example 1
The invention discloses a high-strength steel welding rod for hydroelectric engineering and a preparation method thereof by adopting the prior invention patent application CN201711202650.4, and concretely comprises a welding core and a coating covered on the surface of the welding core, wherein the coating comprises the following components: 9.5 to 10.5 parts of marble, 4.25 to 5 parts of fluorite, 1.5 to 2 parts of rutile, 1.5 to 2 parts of silicon micropowder, 1 to 1.5 parts of manganese metal, 0.8 to 1.05 parts of ferrosilicon, 0.6 to 0.675 part of ferromolybdenum, 0.025 to 0.05 part of graphite, 0.05 to 0.50 part of chromium metal, 0.625 to 0.675 part of iron powder, 0.1 to 0.15 part of sodium carbonate, 0.1 to 0.15 part of sodium alginate, 0.1 to 0.15 part of CMC, 0.05 to 0.075 part of ferroboron and 1.7 to 1.9 parts of nickel powder. The invention has stable electric arc, small splashing, good deslagging, good forming and all-position operation performance, and the vertical welding position strength of the welding deposited metal meets the standard requirement, and the impact toughness at minus 40 ℃ is more than or equal to 47J.
Comparative example 2
An 80 kg-level ultralow-temperature high-strength steel welding rod disclosed by the prior invention patent application CN201410748797.3 and a preparation method thereof are adopted, and specifically comprise a welding core and a welding rod coating formula in percentage by weight: 30-40% of marble, 25-35% of fluorite, 2-5% of wollastonite, 5-8% of electrolytic manganese, 5-8% of ferrosilicon, 7-10% of rutile, 2-5% of ferrotitanium, 0.4-0.8% of CMC, 4-8% of nickel powder, 2-4% of ferromolybdenum and 2-5% of iron powder. The welding rod has no special requirement in preparation, and can be realized by adopting the manufacturing process of hydraulic production equipment commonly used in industry. The welding rod has excellent welding technological performance, mechanical performance and production press coating performance, and has excellent and stable impact toughness even in ultralow temperature environment of-80 ℃.
Comparative example 3
The invention relates to a 800MPa low-alloy high-strength steel welding rod for hydroelectric power and a preparation method thereof, which specifically comprises a welding core and a micro-alloying coating wrapping the surface of the welding core, wherein the welding rod deposited metal comprises the following chemical components in percentage by weight: c: less than or equal to 0.06%; si:0.20 to 0.45 percent; mn:1.40 to 1.70 percent; cr:0.20 to 0.40 percent; ni:1.80 to 2.60 percent; mo:0.25 to 0.45 percent; s: less than or equal to 0.005%; p: less than or equal to 0.008%; ti is less than or equal to 0.020%; re is less than or equal to 0.001%; the balance being Fe. The welding rod can be applied to welding of 800MPa high-strength steel thick plates in construction of water pumping and energy storage power stations, and weld metal still has excellent comprehensive mechanical properties under the working condition of-60 ℃, so that the safety and reliability of welded joints in alpine regions are improved. The preparation method of the welding rod has the advantages of feasible process and easy realization of production and manufacture.
Welding tests were performed on the welding rods prepared in examples 1 to 3 and comparative examples 1 to 3, and welding parameters: I=170-180A, U =26-30V, welding speed is 16-17cm/min, inter-channel temperature is 150-180 ℃ according to national standard welding deposited metal test plates, and physical and chemical properties are tested by sampling as follows:
the chemical components of deposited metal are as follows:
| C | Mn | Si | S | P | Ni | |
| example 1 | 0.06 | 1.45 | 0.18 | 0.004 | 0.005 | 3.22 |
| Example 2 | 0.04 | 1.33 | 0.22 | 0.003 | 0.004 | 3.10 |
| Example 3 | 0.042 | 1.50 | 0.20 | 0.002 | 0.003 | 3.31 |
| Comparative example 1 | 0.093 | 1.54 | 0.30 | 0.0023 | 0.0045 | 2.74 |
| Comparative example 2 | / | / | / | / | / | / |
| Comparative example 3 | / | / | / | / | / | / |
Mechanical properties of deposited metal:
diffusion hydrogen content:
| diffusion hydrogen content mL/100g | |
| Example 1 | 3.1 |
| Example 2 | 3.6 |
| Example 3 | 2.9 |
| Comparative example 1 | / |
| Comparative example 2 | / |
| Comparative example 3 | 2.9 |
From the table, deposited metal after welding by using the welding rod provided by the embodiment of the application is subjected to long-time heat treatment at 580+/-10 ℃ multiplied by 3-6 hours: the tensile strength is 810-860Mpa, the yield strength is not less than 780Mpa, the elongation is not less than 16%, the impact at 50 ℃ below zero reaches 110J, and the content of the diffused hydrogen of the deposited metal is less than 4mL/100g.
The high-strength steel welding rod for hydroelectric engineering in the Chinese invention patent application CN201711202650.4 and the preparation method thereof are obtained by comparing the comparative example with the example, and the 800MPa low-alloy high-strength steel welding rod for hydroelectric use in the Chinese invention patent application CN201510924819.1 and the preparation method thereof are all hydropower industry limiting materials and have different purposes; the steel core components are controlled differently, the range of the steel core components of the product is more reasonable, and the deposited metal nickel (Ni) content is different. And the product can not meet the requirement that the construction of the hydrogen storage tank is subjected to long-time heat treatment at 580+/-10 ℃ for 3-6 hours, and the impact toughness at-50 ℃ is more than or equal to 60J.
The raw materials of 80 kg-level ultralow-temperature high-strength steel welding rod and preparation method () thereof in Chinese patent application CN201410748797.3 are marble, fluorite, wollastonite, electrolytic manganese, ferrosilicon, rutile, ferrotitanium, CMC, nickel powder, ferromolybdenum and iron powder. Comparison results: the marble, fluorite and wollastonite in the raw materials are all mineral materials, and the addition amounts are controlled differently. The product is mainly composed of minerals and chemical raw materials, and has high alkalinity and an alkalinity coefficient B of about 5-6.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
(1) The welding rod provided by the embodiment of the invention effectively improves the low-temperature performance of the welding seam after heat treatment, and solves the problems of insufficient cracking resistance and low-temperature toughness of 800 MPa-level welding seam metal after heat treatment. The welding process performance is good, the electric arc is stable, the splashing is small, and the welding seam is formed attractive;
(2) The welding rod provided by the embodiment of the invention has good welding process performance, stable electric arc, small splashing, attractive weld joint formation and good strength and toughness under the condition of a welding state, meets the welding requirement of all positions, and achieves the aim of high impact toughness at-50 ℃ after long-time heat treatment at 580+/-10 ℃ multiplied by 3-6 hours;
(3) The deposited metal provided by the embodiment of the invention is subjected to long-time heat treatment at 580+/-10 ℃ multiplied by 3-6 hours: the tensile strength is 810-860Mpa, the yield strength is not less than 780Mpa, the elongation is not less than 16%, the impact at 50 ℃ below zero reaches 110J, and the content of the diffused hydrogen of the deposited metal is less than 4mL/100g.
Finally, it is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (5)
1. The deposited metal is characterized by being prepared from an electrode in a welding process, wherein the electrode comprises a steel core and a coating, and the coating comprises the following components in parts by mass: 150-160 parts of calcium carbonate, 50-60 parts of fluoride and titanium dioxide: 25-30 parts of silicon dioxide: 30-32 parts of ferrosilicon powder: 25-28 parts of manganese powder: 20-23 parts of nickel powder: 30-35 parts of a coating, wherein the alkalinity coefficient B of the coating is more than or equal to 5, and the steel core comprises the following components in percentage by mass: c is more than or equal to 0.02% and less than or equal to 0.05%, mn is more than or equal to 0.30% and less than or equal to 0.50%, si is more than or equal to 0.04%, S is less than or equal to 0.005%, P is less than or equal to 0.005%, as is less than or equal to 0.007%, and the balance is Fe and unavoidable impurities, wherein the coating accounts for 33-37% of the mass of the whole welding rod, and the deposited metal is subjected to long-time heat treatment at 580+/-10 ℃ for 3-6 hours: the tensile strength is 810-860Mpa, the yield strength is not less than 780Mpa, the elongation is not less than 16%, the impact at 50 ℃ below zero reaches 110J, and the content of the diffused hydrogen of the deposited metal is less than 4mL/100g.
2. The deposited metal of claim 1, wherein the coating comprises the following components in parts by mass: 153-157 parts of calcium carbonate, 53-57 parts of fluoride and titanium dioxide: 27-28 parts of silicon dioxide: 30.5-31.5 parts of ferrosilicon powder: 26-27 parts of manganese powder: 21-22 parts of nickel powder: 31-34 parts.
3. The deposited metal of claim 1, wherein the coating has an basicity factor of 5-6.
4. The deposited metal of claim 1, wherein the electrode has a diameter of 3.2 mm to 5.0mm.
5. The deposited metal of claim 1, wherein the sheath is coated on the steel core.
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